Applicants can chose to select if their spouse/common-law can accompany them in Canada, thus changing their CRS score accordingly.
Why should you allow such an option ?
Very simple explanation. Married couples (assumed relatively young since they managed to get high enough scores to be selected
back when scores mattered) are more likely to have kids than their first world equivalents. Long term, this is what Canada is aiming for, so in a way incentivizing families with young kids or those wanting to have kids are far more valuable than single applicants.
How the fuck they will not accompany him?
This is just an option for people under specific circumstances where the spouse can't accompany them immediately. The problem is that it has mainly become a way to game the system based on whether they want to increase or decrease points. But giving this option of having your spouse accompany you (and declare that youre married regardless of that choice) is extremely logical. I'd argue not having this option would be a horrendous idea. "Your spouse has to accompany you else you can't immigrate if you're married." Sounds pretty fucking stupid.
The first one is single, apart from the living expenses he can put that money perhaps into investing and such, the other guy has triple the charge in living expenses, remember wife and child, so he basically works for the ongoing life of his family.
So? What your point here? Once you immigrate, the government doesn't decide how you spend your money. You can choose to invest it, spend it all on hookers and drugs, or spend it on your family's needs.
Because the brother/step-brother will help them integrate faster into teh society ?
Yes. Not everyone finds immigration easy, and a lot of people find it very hard to stay away from family. Having immediate family does help people integrate faster because they have the potential to integrate into, for example, their sibling's professional and social network. Speaking a language doesn't make integration seamless. Wtf even is this argument...
The last two years have ruined the Canadian immigration system, I agree. But none of what you say about spouse/family presence makes any sense. They are perfectly logical systems set in place with specific goals.